tenure

: the right to keep a job (especially the job of being a professor at a college or university) for as long as you want to have it

law : the right to use property

Full Definition of TENURE

1

: the act, right, manner, or term of holding something (as a landed property, a position, or an office); especially: a status granted after a trial period to a teacher that gives protection from summary dismissal

… but there is also about it just the trace of the nettlesome righteousness that alienated much of Washington during his tenure there, the not-so-subtle suggestion that while he might be in politics, he is not of politics and certainly not, God_forbid, a politician. —Jim Wooten, New York Times Magazine, 29 Jan. 1995

A mural on the upper half of a four-story guesthouse was painted in 1977 by twelve-year-old schoolchildren, whose tenure on the scaffold must have thrilled their parents. —John McPhee, New Yorker, 22 Feb. 1988